Jann Poppinga's user avatar
Jann Poppinga's user avatar
Jann Poppinga's user avatar
Jann Poppinga
  • Member for 4 years, 3 months
  • Last seen more than a month ago
25 votes
Accepted

How could a subterranean alien lifeform develop space travel?

18 votes

Martians want to keep their weeks roughly in sync with Earth. How would they do that?

5 votes

Tongue Keyboard

4 votes

Does this time travel delivery service cause paradoxes, and if so how can I avoid them?

3 votes

Plausibility of Materials Lasting Millions of Years

2 votes

Plausible explanations as to why an advanced sci-fi species can't reproduce?

1 vote

Where to conceal a small colony in modern North America

1 vote

How can explorers determine whether strings of alien text is meaningful or just nonsense?

1 vote

Complete graph (DAG) of prerequisite relationships of human technology

1 vote

Can People Fool Benevolent Brother's 'Alibi Trackers' and Escape?

1 vote

What would be the best city in the U.S./Canada to live in for a supernatural being trying to exist undetected from humanity?

0 votes

For people on earth, is it possible to harvest energy by decelerating the planet rotation?

0 votes

How to boost the human immune system, realistically?